Table 5 List of Recurrence plot features
From: Review and classification of variability analysis techniques with clinical applications
Short name | Description |
|---|---|
%Recurrence | Represents the number of recurrences among the total number of possible recurrences. |
%Determinism | Represents the number of recurrence points that are part of a diagonal of at least l min elements (usually l min = 2), divided by the number of recurrences. |
%Laminarity | Corresponds to the computation of %Determinism, but considering vertical (or horizontal) lines instead of diagonal lines. |
Trapping Time | Represents the number of recurrence points that are part of vertical (or horizontal) lines, divided by the number of vertical (or horizontal) lines. |
%Determinism/%Recurrence | This ratio is often used to detect transitions of the dynamics. |
Segment lengths | The mean and maximum lengths of diagonal and vertical (or horizontal) lines. |
Shannon entropy | Same feature presented in the informational domain, but applied to the distributions of the lines (either diagonal or vertical/horizontal). |
Kolmogorov entropy | The slope of the line fitting the log-log plot of the distribution of diagonal lines as a function of the threshold used to create the recurrence plot. |